What term describes an experiment that yields consistent results upon repetition?

The term that describes an experiment yielding consistent results upon repetition is "reliable." Reliability refers to the degree to which an assessment tool produces stable and consistent results over repeated trials. In the context of scientific research and experimental design, reliability is crucial because it indicates that the findings are not due to random error or chance but can be replicated under the same or similar conditions.

When an experiment is deemed reliable, it suggests that other researchers can trust the results if they were to conduct the same experiment multiple times. This consistency in outcomes reinforces the credibility of the experimental methodology and findings.

The other terms, while related to the quality of an experiment, have different implications. Accuracy refers to how close a measured value is to the true value, validity relates to how well an experiment measures what it is intended to measure, and consistency, although a synonym for reliability, does not specifically imply the ability to replicate results over time in a scientific context. Therefore, "reliable" is the most appropriate descriptor for experiments that yield consistent results when repeated.